Career: Ranks 10th all-time in career singles win percentage (.743) heading into his senior campaign … Fourth in program history with a .777 career win percentage in doubles at the beginning of the 2014-15 season … Captured four doubles titles in his career (Duke Fab Four Invite - 2011; Duke Fab Four Invite – Blue Bracket, 2012; ITA Carolina Regional – 2012; ITA National Indoors Championship, 2012).

2014-15: Turned in a strong fall for the Blue Devils, going 12-4 and ending the year on a 9-1 streak ... Finished strong by going 4-0 and reaching the championship match of the Dick Vitale Clay Court Classic ... Performed well at the USTA/ITA Carolina Regional, going 5-1 and reaching the semifinals ... Bounced back from an opening set defeat to Wake Forest’s Nicky Kunz in the opening around of the regional to win the next seven sets and advance to the quarterfinals ... Faced North Carolina’s Oystien Stero in the quarters and dropped the first set 7-6 (2) before taking the next two 6-3, 6-3 to move to the semifinals before falling to North Carolina’s Brayden Schnur, ranked No. 7 in the preseason ITA poll, in the semifinals 6-4, 6-4 ... Started the year with a 3-1 record at the Duke Fab Four Invite, claiming fifth place in his flight ... In doubles, ended the year on a high note by teaming up with Josh Levine at the Dike Vitale Clay Court Classic to win his second championship of the fall with 3-0 record ... Downed Caio Gomes and Yannick Zuern of North Florida 8-5 in the title match ... Played with Nicolas Alvarez at the USTA/ITA Carolina Regional and advanced all the way to the semifinals with a 4-1 record ... Suffered a tiebreaker setback to eventual USTA/ITA Carolina Regional champion Ian Dempster and Robbie Mudge of N.C. State in the semifinals ... Started the fall with Chris Mengel at the Duke Fab Four and went 3-0 to win their flight with an 8-7 (5) victory against Kentucky’s Jerry Lopez and Beck Pennington in the championship.

2013-14: Topped the 20-win mark in singles for the third consecutive year, compiling a 20-11 ledger for the season … Went 18-10 in doubles with 15 victories during the dual match season to tie for first on the team … Garnered third team All-ACC recognition … Concluded the season ranked 50th in the final ITA Division I doubles poll along with Fred Saba … He and Saba also rounded out the spring as the fifth-ranked duo in the region after teaming up for a 14-7 overall record and a 12-6 record in dual match play … The tandem went 8-6 at the No. 1 position and 4-0 at the No. 2 spot while posting a 7-3 record in ACC matches … Also totaled a 4-3 ledger playing with Bruno Semenzato … With Semenzato, secured the doubles point for Duke in an ITA Kick-Off Weekend first round victory over No. 54 Oregon … With Saba, blanked Florida State’s 41st-ranked pair of Blake Davis and Dominic Cotrone, 8-0, to clinch the doubles point … Knocked off another ranked opponent in No. 43 Eduardo Segura and Carlos Benito of Georgia Tech (8-3) … Battled to an 8-7 (3) win over North Carolina’s 32nd-ranked duo of Brayden Schnur and Brett Clark in the regular season finale … Topped No. 44 Andreas Bjerrehus and Amerigo Contini of Virginia Tech in the first round of the ACC Championship … Competed primarily at the No. 3 position in singles, where he went 8-4 on the spring … Also played to a 5-1 record in the No. 5 spot in the lineup … Defeated Notre Dame’s Ryan Bandy in three sets in the No. 3 contest to fuel a 4-3 decision for the Blue Devils over the ninth-ranked Fighting Irish March 28 … Clinched a 7-0 sweep of No. 20 Clemson April 11 … Earned a 6-4, 6-7 (5), 7-6 (7) victory over Virginia Tech’s Joao Monteiro in the first round of the ACC Championship … Selected the Carolina Region recipient of the ITA’s Arthur Ashe Leadership and Sportsmanship Award … Also received All-ACC Academic, ACC Academic Honor Roll and ITA All-Academic honors ... Ranked 49th in the ITA’s preseason singles poll while earning a No. 25 preseason doubles ranking with Bruno Semenzato ... Played to a 3-3 singles ledger and a 3-2 mark in doubles during the fall before missing time due to injury ... With Semenzato, advanced to the Round of 16 in the main draw at the ITA All-American Championships, recording an 8-4 upset of second-ranked Hernus Pieters and Ben Wagland of Georgia ... Also competed in the singles main draw in Tulsa after reaching the final round in qualifying play.

2012-13: Completed the season with a team-leading 35-6 record in singles and a 39-4 mark in doubles … Earned the ACC’s automatic bid into the NCAA Individual Doubles Championship with Cunha and reached the semifinals before falling to Virginia’s duo of Jamere Jenkins and Mac Styslinger, 7-5, 6-3 … Earned ITA All-America honors in doubles … Won a team-high 25 matches in singles during the dual season … Went 8-1 in ACC singles contests and posted an undefeated 9-0 conference doubles record with Cunha … Ranked tied for sixth with 35 singles victories in a single season … Ranked tied for fourth in winning percentage for a single season in singles (.854, 35-6) … With Cunha, finished second in single season ACC wins by a doubles tandem with nine … With Cunha, finished tied for first on Duke’s all-time charts in highest ACC doubles winning percentage (9-0, 1.000) … Sat sixth in single season highest doubles winning percentage (39-5, .886) on the program’s all-time chart … With Cunha, finished second in single-season doubles victories by a tandem with 39 … Also ranked eighth along with Cunha in highest single-season doubles winning percentage for a tandem (.883, 39-5) … Clinched four matches for Duke throughout the season … Secured the team’s, 4-2, victory in the NCAA Round of 16 against Kentucky with a 6-3, 5-7, 6-2 win over Grant Roberts at the No. 5 position … From the No. 3 position, clinched the team’s NCAA First Round victory over Coastal Carolina’s Garik Yedigarian, 6-3, 7-6 (2) … Ranked eighth in program history in single season ACC singles victories with eight … Ranked sixth on Duke’s all-time charts for most doubles victories in a single season with nine … Along with Cunha, ranked third in most ACC doubles victories on Duke’s all-time charts (9-0) …With Cunha, won 16 consecutive matches on two occasions throughout the season … Clinched the doubles point a team-high nine times throughout the season with Cunha … With Cunha, concluded the season as the top-ranked doubles tandem in the nation … With Cunha, ranked No. 1 in the ITA national rankings in four of the 10 ITA doubles rankings throughout the spring campaign and was listed in the top five in each of the 10 polls … Listed 16th in the preseason doubles rankings, along with Cunha … Completed the season ranked No. 73 in the final ITA singles rankings … His season-high singles ranking was No. 38 in the Jan. 3 ITA rankings … Ranked in each of the 10 polls in the season’s ITA singles rankings … With Cunha, finished the season as the top-ranked duo in the Carolina Region … Ranked eighth in the final ITA Carolina Region rankings … Finished the season with 39 victories in doubles playing alongside Cunha, good for second on Duke’s all-time charts for most single season wins by a tandem … Played to a 5-1 record against ranked opponents on the season, including a 6-2, 5-7, 6-2 victory over Kentucky’s No. 12 Anthony Rossi in the consolation bracket of the main draw at ITA All-Americans … Captured a 10-3 singles ledger in the spring and a 12-1 mark in the fall with Cunha … With Cunha, ranked third in program history in most matches played by a tandem (44) … Reached the finals of the singles Black Draw at the Duke Fab Four Invite, before not playing out the finals … Teamed with Cunha to win three doubles titles in the fall (Duke Fab Four Invite – Blue Bracket; ITA Carolina Regional; ITA National Indoor Championships) … With Cunha, captured the Blue Bracket doubles title at the Duke Fab Four Invite with an 8-2 victory over Cameron Silverman and Stefan Fortman … Reached the semifinals in the consolation singles draw at the ITA All-Americans before falling to Ohio State’s Connor Smith, 6-2, 7-5 … With Cunha, captured the ITA Carolina doubles title with a 6-2, 6-3 victory over UNCW’s Kosta Blank and Chris Cooprider … Part of the second Blue Devil pair, along with Cunha, to win the ITA National Indoor Championship Doubles Title in November, defeating Georgia’s Hernus Pieters and Ben Wagland, 6-4, 6-2, in the finals.

2011-12: Completed his first season at Duke with a 26-11 record in singles and a team-leading mark of 30-10 in doubles ... The 30 doubles wins are the fourth-most all-time among Blue Devil freshmen and gave him the eighth-highest doubles winning percentage at the time on the program’s freshman charts (.750) ... Went 7-2 in ACC singles contests as a rookie while teaming with Cale Hammond for an 8-2 mark in conference doubles matches ... He and Hammond rank tied for 10th on Duke’s all-time chart for most ACC doubles victories as a team with eight ... The duo’s eight ACC doubles wins are also tied for the fourth most all-time on the program’s single-season list ... Shares the program record for most ACC doubles wins as a freshman (8) ... With Hammond, compiled a 4-1 ledger at the No. 2 doubles position and a 5-1 mark at the No. 3 spot ... The tandem won nine consecutive doubles matches from March 11 to Apr. 8, including eight straight in ACC play ... He and Hammond secured the doubles point for Duke twice during that stretch, including in a 6-1 victory over No. 8 California ... Also paired with Torsten Wietoska for a 16-5 doubles record, including a 14-3 ledger from the No. 3 position ... He and Wietoska topped No. 29 Andrew Butz and Bob van Overbeek of Florida, 8-6, at the ITA National Team Indoor Championships on Feb. 19 ... The duo won seven consecutive matches at the No. 3 spot from Jan. 28 to Feb. 17 ... He and Wietoska also closed the season on a four-match win streak, going 4-0 in NCAA Championship tournament doubles action ... Completed the dual match season with a 19-5 record, including a 16-2 ledger at the No. 5 slot in the lineup ... Went 3-5 against ranked singles opponents, highlighted by a 6-3, 6-4 victory over No. 51 Yannick Hanfmann of Southern California in the NCAA Championship tournament quarterfinals ... Clinched two Duke victories on the season, including a 6-1 win over No. 30 Notre Dame on Feb. 5 ... Started the spring on a 7-0 win streak from the No. 5 and 6 singles positions ... Earned his first singles victory in the Blue Devils’ first dual match of the season, topping Alex Buzzi of No. 32 Michigan, 6-3, 6-4, at the No. 6 spot in the lineup ... Went 7-6 in fall singles action after earning the No. 6 ranking in the ITA’s preseason newcomer list ... Advanced to the semifinals of the qualifying stage in singles at the ITA All-American Championships before falling to No. 85 Kevin King of Georgia Tech, 6-4, 6-1 ... Paired with Wietoska for a 2-1 doubles record during the fall ... Also teamed with Fred Saba for a 5-3 mark ... With Saba, ranked as high as No. 40 on the ITA’s doubles list ... He and Saba won a doubles title at the Fab Four Invite, defeating Louisville’s Sebastian Stiefelmeyer and Andrew Carter, 8-3, in the championship match ... The duo also reached the finals of the qualifying stage at the ITA All-American Championships ... With Saba, defeated one ranked doubles pair in an 8-4 victory over No. 20 Emmett Egger and Kyle McMorrow of Washington.

Prior to Duke: Ranked the No. 6 overall freshman/newcomer by the ITA ... Ranked No. 20 in Switzerland ... In April 2011, earned a No. 1125 ATP ranking ... Reached the quarterfinals of the ITF Future Fällanden and earned two ATP points ... Earned his first ATP point in 2010 at the ITF Future tournament in Ueberlingen ... Won the junior trophy at the Mercedes Cup in Stuttgart in 2009 ... Defeated ATP No. 655-ranked player at the ITF Future tournament in 2009 ... Semifinalist at the ITF U-18’s in Leuggern in 2009 ... Was a finalist at the ITF U18’s in Luzern in the summers of 2007 and 2008 ... Two-time participant in the international masters of the Nike Junior Tour in South Africa in 2003 and France in 2005.

Personal: Born Raphael Hemmeler on July 12, 1991, in Zurich, Switzerland ... Son of Philipp and Susi Hemmeler ... Has one brother, Marc ... Lists Roger Federer as his favorite athlete.